This one is fairly non-obvious, and also something of a Mythology Gag. In the 2010 game Dr. Groves is voiced by the same guy who played Lt. Gorman in Aliens. You can only tell by looking at the credits, though, as he uses a completely different accent.

Which would go against his belief that there's no need for two composers working in the same film. He only needs an additional composer if he's pressed for time, and he couldn't make the deadline. "How many composers does it take to screw a light bulb?", indeed.